I Was Invincible from the Start, Yet Chose to Hide Among Humans

[Alternate setting + wild imagination + pseudo-invincible protagonist + no System] In 2124, a comet crashed into Earth, pierced the mantle, and released ancient monsters, while also bringing the opportunity for spiritual qi revival. Cities became ruins, and humanity awakened in the depths of despair. With technology and spiritual powers existing side by side, people began a desperate struggle to the death against the monsters from beneath the earth!